* Fixes.
RISC-V:
* Svade and Svadu (accessed and dirty bit) extension support for host and
guest. This was acked on the mailing list by the RISC-V maintainer, see
https://patchew.org/linux/20240726084931.28924-1-yongxuan.wang@sifive.com/.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull more kvm updates from Paolo Bonzini:
- ARM fixes
- RISC-V Svade and Svadu (accessed and dirty bit) extension support for
host and guest
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: riscv: selftests: Add Svade and Svadu Extension to get-reg-list test
RISC-V: KVM: Add Svade and Svadu Extensions Support for Guest/VM
dt-bindings: riscv: Add Svade and Svadu Entries
RISC-V: Add Svade and Svadu Extensions Support
KVM: arm64: Use MDCR_EL2.HPME to evaluate overflow of hyp counters
KVM: arm64: Ignore PMCNTENSET_EL0 while checking for overflow status
KVM: arm64: Mark set_sysreg_masks() as inline to avoid build failure
KVM: arm64: vgic-its: Add stronger type-checking to the ITS entry sizes
KVM: arm64: vgic: Kill VGIC_MAX_PRIVATE definition
KVM: arm64: vgic: Make vgic_get_irq() more robust
KVM: arm64: vgic-v3: Sanitise guest writes to GICR_INVLPIR
since 2024.07.26:
assorted minor bug fixes
assorted platform specific tweaks
initial RAPL PSYS (SysWatt) support
Signed-off-by: Len Brown <len.brown@intel.com>
Introduce the counter as a part of global, platform counters structure.
We open the counter for only one cpu, but otherwise treat it as an
ordinary RAPL counter, allowing for grouped perf read.
The counter is disabled by default, because it's interpretation may
require additional, platform specific information, making it unsuitable
for general use.
Signed-off-by: Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Add '+' to optstring when early scanning for --no-msr and --no-perf.
It causes option processing to stop as soon as a nonoption argument is
encountered, effectively skipping child's arguments.
Fixes: 3e4048466c ("tools/power turbostat: Add --no-msr option")
Signed-off-by: Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Force the --no-perf early to prevent using it as a source. User asks for
raw values, but perf returns them relative to the opening of the file
descriptor.
Signed-off-by: Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
On some machines, the graphics device is enumerated as
/sys/class/drm/card1 instead of /sys/class/drm/card0. The current
implementation does not handle this scenario, resulting in the loss of
graphics C6 residency and frequency information.
Add support for /sys/class/drm/card1, ensuring that turbostat can
retrieve and display the graphics columns for these platforms.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Snapshots of the graphics sysfs knobs are taken based on file
descriptors. To optimize this process, open the files and cache the file
descriptors during the graphics probe phase. As a result, the previously
cached pathnames become redundant and are removed.
This change aims to streamline the code without altering its functionality.
No functional change intended.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Currently, there is an inconsistency in how graphics sysfs knobs are
accessed: graphics residency sysfs knobs are opened and closed for each
read, while graphics frequency sysfs knobs are opened once and remain
open until turbostat exits. This inconsistency is confusing and adds
unnecessary code complexity.
Consolidate the access method by opening the sysfs files once and
reusing the file pointers for subsequent accesses. This approach
simplifies the code and ensures a consistent method for accessing
graphics sysfs knobs.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
The graphics sysfs knobs are read-only, making the use of fflush()
before reading them redundant.
Remove the unnecessary fflush() call.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
In various generations, platforms often share a majority of features,
diverging only in a few specific aspects. The current approach of using
hardcoded values in 'platform_features' structure fails to effectively
represent these divergences.
To improve the description of platform divergence:
1. Each newly introduced 'platform_features' structure must have a base,
typically derived from the previous generation.
2. Platform feature values should be inherited from the base structure
rather than being hardcoded.
This approach ensures a more accurate and maintainable representation of
platform-specific features across different generations.
Converts `adl_features` and `lnl_features` to follow this new scheme.
No functional change.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Add initial support for GraniteRapids-D. It shares the same features
with SapphireRapids.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Lunarlake supports CC1/CC6/CC7/PC2/PC6/PC10.
Remove PC3 support on Lunarlake.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
As ARL shares the same features with ADL/RPL/MTL, now 'arl_features' is
used by Lunarlake platform only.
Rename 'arl_features' to 'lnl_features'.
No functional change.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Similar to ADL/RPL/MTL, ARL supports CC1/CC6/CC7/PC2/PC3/PC6/PC8/PC10.
Add back PC8 support on Arrowlake.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Similar to ADL/RPL, MTL support CC1/CC6/CC7/PC2/PC3/PC6/PC8/CP10.
Remove PC7/PC9 support on MTL.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Honor --show CPU and --show Core when "topo.num_cpus == 1".
Previously turbostat assumed that on a 1-CPU system, these
columns should never appear.
Honoring these flags makes it easier for several programs
that parse turbostat output.
Signed-off-by: Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
parse_cpu_string() parses the string input either from command line or
from /sys/fs/cgroup/cpuset.cpus.effective to get a list of CPUs that
turbostat can run with.
The cpu string returned by /sys/fs/cgroup/cpuset.cpus.effective contains
a trailing '\n', but strtoul() fails to treat this as an error.
That says, for the code below
val = ("\n", NULL, 10);
val returns 0, and errno is also not set.
As a result, CPU0 is erroneously considered as allowed CPU and this
causes failures when turbostat tries to run on CPU0.
get_counters: Could not migrate to CPU 0
...
turbostat: re-initialized with num_cpus 8, allowed_cpus 5
get_counters: Could not migrate to CPU 0
Add a check to return immediately if '\n' or '\0' is detected.
Fixes: 8c3dd2c9e5 ("tools/power/turbostat: Abstrct function for parsing cpu string")
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Intel hybrid platforms expose different perf devices for P and E cores.
Instead of one, "/sys/bus/event_source/devices/cpu" device, there are
"/sys/bus/event_source/devices/{cpu_core,cpu_atom}".
This, however makes it more complicated for the user,
because most of the counters are available on both and had to be
handled manually.
This patch allows users to use "virtual" cpu device that is seemingly
translated to cpu_core and cpu_atom perf devices, depending on the type
of a CPU we are opening the counter for.
Signed-off-by: Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
If the very first printed column was for a PMT counter of type xtal_time
we would misalign the column header, because we were always printing the
delimiter.
Signed-off-by: Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Fix build regression seen when using old gcc-9 compiler.
Signed-off-by: Todd Brandt <todd.e.brandt@intel.com>
Reviewed-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
- Add generic support for built-in boot DTB files
- Enable TAB cycling for dialog buttons in nconfig
- Fix issues in streamline_config.pl
- Refactor Kconfig
- Add support for Clang's AutoFDO (Automatic Feedback-Directed
Optimization)
- Add support for Clang's Propeller, a profile-guided optimization.
- Change the working directory to the external module directory for M=
builds
- Support building external modules in a separate output directory
- Enable objtool for *.mod.o and additional kernel objects
- Use lz4 instead of deprecated lz4c
- Work around a performance issue with "git describe"
- Refactor modpost
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Merge tag 'kbuild-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
- Add generic support for built-in boot DTB files
- Enable TAB cycling for dialog buttons in nconfig
- Fix issues in streamline_config.pl
- Refactor Kconfig
- Add support for Clang's AutoFDO (Automatic Feedback-Directed
Optimization)
- Add support for Clang's Propeller, a profile-guided optimization.
- Change the working directory to the external module directory for M=
builds
- Support building external modules in a separate output directory
- Enable objtool for *.mod.o and additional kernel objects
- Use lz4 instead of deprecated lz4c
- Work around a performance issue with "git describe"
- Refactor modpost
* tag 'kbuild-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (85 commits)
kbuild: rename .tmp_vmlinux.kallsyms0.syms to .tmp_vmlinux0.syms
gitignore: Don't ignore 'tags' directory
kbuild: add dependency from vmlinux to resolve_btfids
modpost: replace tdb_hash() with hash_str()
kbuild: deb-pkg: add python3:native to build dependency
genksyms: reduce indentation in export_symbol()
modpost: improve error messages in device_id_check()
modpost: rename alias symbol for MODULE_DEVICE_TABLE()
modpost: rename variables in handle_moddevtable()
modpost: move strstarts() to modpost.h
modpost: convert do_usb_table() to a generic handler
modpost: convert do_of_table() to a generic handler
modpost: convert do_pnp_device_entry() to a generic handler
modpost: convert do_pnp_card_entries() to a generic handler
modpost: call module_alias_printf() from all do_*_entry() functions
modpost: pass (struct module *) to do_*_entry() functions
modpost: remove DEF_FIELD_ADDR_VAR() macro
modpost: deduplicate MODULE_ALIAS() for all drivers
modpost: introduce module_alias_printf() helper
modpost: remove unnecessary check in do_acpi_entry()
...
A collection of small fixes. Majority of changes are device-specific
fixes and quirks, while there are a few core fixes to address
regressions and corner cases spotted by fuzzers.
- Fix of spinlock range that wrongly covered kvfree() call in rawmidi
- Fix potential NULL dereference at PCM mmap
- Fix incorrectly advertised MIDI 2.0 UMP Function Block info
- Various ASoC AMD quirks and fixes
- ASoC SOF Intel, Mediatek, HDMI-codec fixes
- A few more quirks and TAS2781 codec fix for HD-audio
- A couple of fixes for USB-audio for malicious USB descriptors
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Merge tag 'sound-fix-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A collection of small fixes. Majority of changes are device-specific
fixes and quirks, while there are a few core fixes to address
regressions and corner cases spotted by fuzzers.
- Fix of spinlock range that wrongly covered kvfree() call in rawmidi
- Fix potential NULL dereference at PCM mmap
- Fix incorrectly advertised MIDI 2.0 UMP Function Block info
- Various ASoC AMD quirks and fixes
- ASoC SOF Intel, Mediatek, HDMI-codec fixes
- A few more quirks and TAS2781 codec fix for HD-audio
- A couple of fixes for USB-audio for malicious USB descriptors"
* tag 'sound-fix-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (30 commits)
ALSA: hda: improve bass speaker support for ASUS Zenbook UM5606WA
ALSA: hda/realtek: Apply quirk for Medion E15433
ASoC: amd: yc: Add a quirk for microfone on Lenovo ThinkPad P14s Gen 5 21MES00B00
ASoC: SOF: ipc3-topology: Convert the topology pin index to ALH dai index
ASoC: mediatek: Check num_codecs is not zero to avoid panic during probe
ASoC: amd: yc: Fix for enabling DMIC on acp6x via _DSD entry
ALSA: ump: Fix evaluation of MIDI 1.0 FB info
ALSA: core: Fix possible NULL dereference caused by kunit_kzalloc()
ALSA: hda: Show the codec quirk info at probing
ALSA: asihpi: Remove unused variable
ALSA: hda/realtek: Set PCBeep to default value for ALC274
ALSA: hda/tas2781: Add speaker id check for ASUS projects
ALSA: hda/realtek: Update ALC225 depop procedure
ALSA: hda/realtek: Enable speaker pins for Medion E15443 platform
ALSA: hda/realtek: fix mute/micmute LEDs don't work for EliteBook X G1i
ALSA: usb-audio: Fix out of bounds reads when finding clock sources
ALSA: rawmidi: Fix kvfree() call in spinlock
ALSA: hda/realtek: Fix Internal Speaker and Mic boost of Infinix Y4 Max
ASoC: amd: yc: Add quirk for microphone on Lenovo Thinkpad T14s Gen 6 21M1CTO1WW
ASoC: doc: dapm: Add location information for dapm-graph tool
...
Here is the "big and hairy" char/misc/iio and other small driver
subsystem updates for 6.13-rc1. Sorry for doing this at the end of the
merge window, conference and holiday travel got in the way on my side
(hence the 5am pull request emails...)
Loads of things in here, and even a fun merge conflict!
- rust misc driver bindings and other rust changes to make misc
drivers actually possible. I think this is the tipping point,
expect to see way more rust drivers going forward now that these
bindings are present. Next merge window hopefully we will have pci
and platform drivers working, which will fully enable almost all
driver subsystems to start accepting (or at least getting) rust
drivers. This is the end result of a lot of work from a lot of
people, congrats to all of them for getting this far, you've proved
many of us wrong in the best way possible, working code :)
- IIO driver updates, too many to list individually, that subsystem
keeps growing and growing...
- Interconnect driver updates
- nvmem driver updates
- pwm driver updates
- platform_driver::remove() fixups, loads of them
- counter driver updates
- misc driver updates (keba?)
- binder driver updates and fixes
- loads of other small char/misc/etc driver updates and additions,
full details in the shortlog.
Note, there is a semi-hairy rust merge conflict when pulling this. The
resolution has been in linux-next for a while and can be seen here:
https://lore.kernel.org/all/20241111173459.2646d4af@canb.auug.org.au/
All of these have been in linux-next for a while, with no other reported
issues other than that merge conflict.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc/IIO/whatever driver subsystem updates from Greg KH:
"Here is the 'big and hairy' char/misc/iio and other small driver
subsystem updates for 6.13-rc1.
Loads of things in here, and even a fun merge conflict!
- rust misc driver bindings and other rust changes to make misc
drivers actually possible.
I think this is the tipping point, expect to see way more rust
drivers going forward now that these bindings are present. Next
merge window hopefully we will have pci and platform drivers
working, which will fully enable almost all driver subsystems to
start accepting (or at least getting) rust drivers.
This is the end result of a lot of work from a lot of people,
congrats to all of them for getting this far, you've proved many of
us wrong in the best way possible, working code :)
- IIO driver updates, too many to list individually, that subsystem
keeps growing and growing...
- Interconnect driver updates
- nvmem driver updates
- pwm driver updates
- platform_driver::remove() fixups, loads of them
- counter driver updates
- misc driver updates (keba?)
- binder driver updates and fixes
- loads of other small char/misc/etc driver updates and additions,
full details in the shortlog.
All of these have been in linux-next for a while, with no other
reported issues other than that merge conflict"
* tag 'char-misc-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (401 commits)
mei: vsc: Fix typo "maintstepping" -> "mainstepping"
firmware: Switch back to struct platform_driver::remove()
misc: isl29020: Fix the wrong format specifier
scripts/tags.sh: Don't tag usages of DEFINE_MUTEX
fpga: Switch back to struct platform_driver::remove()
mei: vsc: Improve error logging in vsc_identify_silicon()
mei: vsc: Do not re-enable interrupt from vsc_tp_reset()
dt-bindings: spmi: qcom,x1e80100-spmi-pmic-arb: Add SAR2130P compatible
dt-bindings: spmi: spmi-mtk-pmif: Add compatible for MT8188
spmi: pmic-arb: fix return path in for_each_available_child_of_node()
iio: Move __private marking before struct element priv in struct iio_dev
docs: iio: ad7380: add adaq4370-4 and adaq4380-4
iio: adc: ad7380: add support for adaq4370-4 and adaq4380-4
iio: adc: ad7380: use local dev variable to shorten long lines
iio: adc: ad7380: fix oversampling formula
dt-bindings: iio: adc: ad7380: add adaq4370-4 and adaq4380-4 compatible parts
bus: mhi: host: pci_generic: Use pcim_iomap_region() to request and map MHI BAR
bus: mhi: host: Switch trace_mhi_gen_tre fields to native endian
misc: atmel-ssc: Use of_property_present() for non-boolean properties
misc: keba: Add hardware dependency
...
This consists of 3 fixes, the main one build that we build the kallsyms
test modules all over again if we just run make twice.
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Merge tag 'modules-6.13-rc1-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux
Pull modules fixes from Luis Chamberlain:
"Three fixes, the main one build that we build the kallsyms test
modules all over again if we just run make twice"
* tag 'modules-6.13-rc1-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux:
selftests: find_symbol: Actually use load_mod() parameter
selftests: kallsyms: fix and clarify current test boundaries
selftests: kallsyms: fix double build stupidity
The parameter passed to load_mod() is stored in $MOD, but never used.
Obviously it was intended to be used instead of the hardcoded
"test_kallsyms_b" module name.
Fixes: 84b4a51fce ("selftests: add new kallsyms selftests")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
* Support for pointer masking in userspace,
* Support for probing vector misaligned access performance.
* Support for qspinlock on systems with Zacas and Zabha.
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Merge tag 'riscv-for-linus-6.13-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-v updates from Palmer Dabbelt:
- Support for pointer masking in userspace
- Support for probing vector misaligned access performance
- Support for qspinlock on systems with Zacas and Zabha
* tag 'riscv-for-linus-6.13-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (38 commits)
RISC-V: Remove unnecessary include from compat.h
riscv: Fix default misaligned access trap
riscv: Add qspinlock support
dt-bindings: riscv: Add Ziccrse ISA extension description
riscv: Add ISA extension parsing for Ziccrse
asm-generic: ticket-lock: Add separate ticket-lock.h
asm-generic: ticket-lock: Reuse arch_spinlock_t of qspinlock
riscv: Implement xchg8/16() using Zabha
riscv: Implement arch_cmpxchg128() using Zacas
riscv: Improve zacas fully-ordered cmpxchg()
riscv: Implement cmpxchg8/16() using Zabha
dt-bindings: riscv: Add Zabha ISA extension description
riscv: Implement cmpxchg32/64() using Zacas
riscv: Do not fail to build on byte/halfword operations with Zawrs
riscv: Move cpufeature.h macros into their own header
KVM: riscv: selftests: Add Smnpm and Ssnpm to get-reg-list test
RISC-V: KVM: Allow Smnpm and Ssnpm extensions for guests
riscv: hwprobe: Export the Supm ISA extension
riscv: selftests: Add a pointer masking test
riscv: Allow ptrace control of the tagged address ABI
...
Highlights for this merge window:
* The whole caching of module code into huge pages by Mike Rapoport is going
in through Andrew Morton's tree due to some other code dependencies. That's
really the biggest highlight for Linux kernel modules in this release. With
it we share huge pages for modules, starting off with x86. Expect to see that
soon through Andrew!
* Helge Deller addressed some lingering low hanging fruit alignment
enhancements by. It is worth pointing out that from his old patch series
I dropped his vmlinux.lds.h change at Masahiro's request as he would
prefer this to be specified in asm code [0].
[0] https://lore.kernel.org/all/20240129192644.3359978-5-mcgrof@kernel.org/T/#m9efef5e700fbecd28b7afb462c15eed8ba78ef5a
* Matthew Maurer and Sami Tolvanen have been tag teaming to help
get us closer to a modversions for Rust. In this cycle we take in
quite a lot of the refactoring for ELF validation. I expect modversions
for Rust will be merged by v6.14 as that code is mostly ready now.
* Adds a new modules selftests: kallsyms which helps us tests find_symbol()
and the limits of kallsyms on Linux today.
* We have a realtime mailing list to kernel-ci testing for modules now
which relies and combines patchwork, kpd and kdevops:
- https://patchwork.kernel.org/project/linux-modules/list/
- https://github.com/linux-kdevops/kdevops/blob/main/docs/kernel-ci/README.md
- https://github.com/linux-kdevops/kdevops/blob/main/docs/kernel-ci/kernel-ci-kpd.md
- https://github.com/linux-kdevops/kdevops/blob/main/docs/kernel-ci/linux-modules-kdevops-ci.md
If you want to help avoid Linux kernel modules regressions, now its simple,
just add a new Linux modules sefltests under tools/testing/selftests/module/
That is it. All new selftests will be used and leveraged automatically by
the CI.
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Merge tag 'modules-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux
Pull modules updates from Luis Chamberlain:
- The whole caching of module code into huge pages by Mike Rapoport is
going in through Andrew Morton's tree due to some other code
dependencies. That's really the biggest highlight for Linux kernel
modules in this release. With it we share huge pages for modules,
starting off with x86. Expect to see that soon through Andrew!
- Helge Deller addressed some lingering low hanging fruit alignment
enhancements by. It is worth pointing out that from his old patch
series I dropped his vmlinux.lds.h change at Masahiro's request as he
would prefer this to be specified in asm code [0].
[0] https://lore.kernel.org/all/20240129192644.3359978-5-mcgrof@kernel.org/T/#m9efef5e700fbecd28b7afb462c15eed8ba78ef5a
- Matthew Maurer and Sami Tolvanen have been tag teaming to help get us
closer to a modversions for Rust. In this cycle we take in quite a
lot of the refactoring for ELF validation. I expect modversions for
Rust will be merged by v6.14 as that code is mostly ready now.
- Adds a new modules selftests: kallsyms which helps us tests
find_symbol() and the limits of kallsyms on Linux today.
- We have a realtime mailing list to kernel-ci testing for modules now
which relies and combines patchwork, kpd and kdevops:
https://patchwork.kernel.org/project/linux-modules/list/https://github.com/linux-kdevops/kdevops/blob/main/docs/kernel-ci/README.mdhttps://github.com/linux-kdevops/kdevops/blob/main/docs/kernel-ci/kernel-ci-kpd.mdhttps://github.com/linux-kdevops/kdevops/blob/main/docs/kernel-ci/linux-modules-kdevops-ci.md
If you want to help avoid Linux kernel modules regressions, now its
simple, just add a new Linux modules sefltests under
tools/testing/selftests/module/ That is it. All new selftests will be
used and leveraged automatically by the CI.
* tag 'modules-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux:
tests/module/gen_test_kallsyms.sh: use 0 value for variables
scripts: Remove export_report.pl
selftests: kallsyms: add MODULE_DESCRIPTION
selftests: add new kallsyms selftests
module: Reformat struct for code style
module: Additional validation in elf_validity_cache_strtab
module: Factor out elf_validity_cache_strtab
module: Group section index calculations together
module: Factor out elf_validity_cache_index_str
module: Factor out elf_validity_cache_index_sym
module: Factor out elf_validity_cache_index_mod
module: Factor out elf_validity_cache_index_info
module: Factor out elf_validity_cache_secstrings
module: Factor out elf_validity_cache_sechdrs
module: Factor out elf_validity_ehdr
module: Take const arg in validate_section_offset
modules: Add missing entry for __ex_table
modules: Ensure 64-bit alignment on __ksymtab_* sections
- Svade and Svadu extension support for Host and Guest/VM
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Merge tag 'kvm-riscv-6.13-2' of https://github.com/kvm-riscv/linux into HEAD
KVM/riscv changes for 6.13 part #2
- Svade and Svadu extension support for Host and Guest/VM
* Support for pointer masking in userspace,
* Support for probing vector misaligned access performance.
* Support for qspinlock on systems with Zacas and Zabha.
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Merge tag 'riscv-for-linus-6.13-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux into HEAD
RISC-V Paches for the 6.13 Merge Window, Part 1
* Support for pointer masking in userspace,
* Support for probing vector misaligned access performance.
* Support for qspinlock on systems with Zacas and Zabha.
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Merge tag 'vfs-6.13-rc1.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull vfs fixes from Christian Brauner:
- Fix a few iomap bugs
- Fix a wrong argument in backing file callback
- Fix security mount option retrieval in statmount()
- Cleanup how statmount() handles unescaped options
- Add a missing inode_owner_or_capable() check for setting write hints
- Clear the return value in read_kcore_iter() after a successful
iov_iter_zero()
- Fix a mount_setattr() selftest
- Fix function signature in mount api documentation
- Remove duplicate include header in the fscache code
* tag 'vfs-6.13-rc1.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
fs/backing_file: fix wrong argument in callback
fs_parser: update mount_api doc to match function signature
fs: require inode_owner_or_capable for F_SET_RW_HINT
fs/proc/kcore.c: Clear ret value in read_kcore_iter after successful iov_iter_zero
statmount: fix security option retrieval
statmount: clean up unescaped option handling
fscache: Remove duplicate included header
iomap: elide flush from partial eof zero range
iomap: lift zeroed mapping handling into iomap_zero_range()
iomap: reset per-iter state on non-error iter advances
iomap: warn on zero range of a post-eof folio
selftests/mount_setattr: Fix failures on 64K PAGE_SIZE kernels
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Merge tag 'pci-v6.13-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
Pull PCI updates from Bjorn Helgaas:
"Enumeration:
- Make pci_stop_dev() and pci_destroy_dev() safe so concurrent
callers can't stop a device multiple times, even as we migrate from
the global pci_rescan_remove_lock to finer-grained locking (Keith
Busch)
- Improve pci_walk_bus() implementation by making it recursive and
moving locking up to avoid need for a 'locked' parameter (Keith
Busch)
- Unexport pci_walk_bus_locked(), which is only used internally by
the PCI core (Keith Busch)
- Detect some Thunderbolt chips that are built-in and hence
'trustworthy' by a heuristic since the 'ExternalFacingPort' and
'usb4-host-interface' ACPI properties are not quite enough (Esther
Shimanovich)
Resource management:
- Use PCI bus addresses (not CPU addresses) in 'ranges' properties
when building dynamic DT nodes so systems where PCI and CPU
addresses differ work correctly (Andrea della Porta)
- Tidy resource sizing and assignment with helpers to reduce
redundancy (Ilpo Järvinen)
- Improve pdev_sort_resources() 'bogus alignment' warning to be more
specific (Ilpo Järvinen)
Driver binding:
- Convert driver .remove_new() callbacks to .remove() again to finish
the conversion from returning 'int' to being 'void' (Sergio
Paracuellos)
- Export pcim_request_all_regions(), a managed interface to request
all BARs (Philipp Stanner)
- Replace pcim_iomap_regions_request_all() with
pcim_request_all_regions(), and pcim_iomap_table()[n] with
pcim_iomap(n), in the following drivers: ahci, crypto qat, crypto
octeontx2, intel_th, iwlwifi, ntb idt, serial rp2, ALSA korg1212
(Philipp Stanner)
- Remove the now unused pcim_iomap_regions_request_all() (Philipp
Stanner)
- Export pcim_iounmap_region(), a managed interface to unmap and
release a PCI BAR (Philipp Stanner)
- Replace pcim_iomap_regions(mask) with pcim_iomap_region(n), and
pcim_iounmap_regions(mask) with pcim_iounmap_region(n), in the
following drivers: fpga dfl-pci, block mtip32xx, gpio-merrifield,
cavium (Philipp Stanner)
Error handling:
- Add sysfs 'reset_subordinate' to reset the entire hierarchy below a
bridge; previously Secondary Bus Reset could only be used when
there was a single device below a bridge (Keith Busch)
- Warn if we reset a running device where the driver didn't register
pci_error_handlers notification callbacks (Keith Busch)
ASPM:
- Disable ASPM L1 before touching L1 PM Substates to follow the spec
closer and avoid a CPU load timeout on some platforms (Ajay
Agarwal)
- Set devices below Intel VMD to D0 before enabling ASPM L1 Substates
as required per spec for all L1 Substates changes (Jian-Hong Pan)
Power management:
- Enable starfive controller runtime PM before probing host bridge
(Mayank Rana)
- Enable runtime power management for host bridges (Krishna chaitanya
chundru)
Power control:
- Use of_platform_device_create() instead of of_platform_populate()
to create pwrctl platform devices so we can control it based on the
child nodes (Manivannan Sadhasivam)
- Create pwrctrl platform devices only if there's a relevant power
supply property (Manivannan Sadhasivam)
- Add device link from the pwrctl supplier to the PCI dev to ensure
pwrctl drivers are probed before the PCI dev driver; this avoids a
race where pwrctl could change device power state while the PCI
driver was active (Manivannan Sadhasivam)
- Find pwrctl device for removal with of_find_device_by_node()
instead of searching all children of the parent (Manivannan
Sadhasivam)
- Rename 'pwrctl' to 'pwrctrl' to match new bandwidth controller
('bwctrl') and hotplug files (Bjorn Helgaas)
Bandwidth control:
- Add read/modify/write locking for Link Control 2, which is used to
manage Link speed (Ilpo Järvinen)
- Extract Link Bandwidth Management Status check into
pcie_lbms_seen(), where it can be shared between the bandwidth
controller and quirks that use it to help retrain failed links
(Ilpo Järvinen)
- Re-add Link Bandwidth notification support with updates to address
the reasons it was previously reverted (Alexandru Gagniuc, Ilpo
Järvinen)
- Add pcie_set_target_speed() and related functionality so drivers
can manage PCIe Link speed based on thermal or other constraints
(Ilpo Järvinen)
- Add a thermal cooling driver to throttle PCIe Links via the
existing thermal management framework (Ilpo Järvinen)
- Add a userspace selftest for the PCIe bandwidth controller (Ilpo
Järvinen)
PCI device hotplug:
- Add hotplug controller driver for Marvell OCTEON multi-function
device where function 0 has a management console interface to
enable/disable and provision various personalities for the other
functions (Shijith Thotton)
- Retain a reference to the pci_bus for the lifetime of a pci_slot to
avoid a use-after-free when the thunderbolt driver resets USB4 host
routers on boot, causing hotplug remove/add of downstream docks or
other devices (Lukas Wunner)
- Remove unused cpcihp struct cpci_hp_controller_ops.hardware_test
(Guilherme Giacomo Simoes)
- Remove unused cpqphp struct ctrl_dbg.ctrl (Christophe JAILLET)
- Use pci_bus_read_dev_vendor_id() instead of hand-coded presence
detection in cpqphp (Ilpo Järvinen)
- Simplify cpqphp enumeration, which is already simple-minded and
doesn't handle devices below hot-added bridges (Ilpo Järvinen)
Virtualization:
- Add ACS quirk for Wangxun FF5xxx NICs, which don't advertise an ACS
capability but do isolate functions as though PCI_ACS_RR and
PCI_ACS_CR were set, so the functions can be in independent IOMMU
groups (Mengyuan Lou)
TLP Processing Hints (TPH):
- Add and document TLP Processing Hints (TPH) support so drivers can
enable and disable TPH and the kernel can save/restore TPH
configuration (Wei Huang)
- Add TPH Steering Tag support so drivers can retrieve Steering Tag
values associated with specific CPUs via an ACPI _DSM to improve
performance by directing DMA writes closer to their consumers (Wei
Huang)
Data Object Exchange (DOE):
- Wait up to 1 second for DOE Busy bit to clear before writing a
request to the mailbox to avoid failures if the mailbox is still
busy from a previous transfer (Gregory Price)
Endpoint framework:
- Skip attempts to allocate from endpoint controller memory window if
the requested size is larger than the window (Damien Le Moal)
- Add and document pci_epc_mem_map() and pci_epc_mem_unmap() to
handle controller-specific size and alignment constraints, and add
test cases to the endpoint test driver (Damien Le Moal)
- Implement dwc pci_epc_ops.align_addr() so pci_epc_mem_map() can
observe DWC-specific alignment requirements (Damien Le Moal)
- Synchronously cancel command handler work in endpoint test before
cleaning up DMA and BARs (Damien Le Moal)
- Respect endpoint page size in dw_pcie_ep_align_addr() (Niklas
Cassel)
- Use dw_pcie_ep_align_addr() in dw_pcie_ep_raise_msi_irq() and
dw_pcie_ep_raise_msix_irq() instead of open coding the equivalent
(Niklas Cassel)
- Avoid NULL dereference if Modem Host Interface Endpoint lacks
'mmio' DT property (Zhongqiu Han)
- Release PCI domain ID of Endpoint controller parent (not controller
itself) and before unregistering the controller, to avoid
use-after-free (Zijun Hu)
- Clear secondary (not primary) EPC in pci_epc_remove_epf() when
removing the secondary controller associated with an NTB (Zijun Hu)
Cadence PCIe controller driver:
- Lower severity of 'phy-names' message (Bartosz Wawrzyniak)
Freescale i.MX6 PCIe controller driver:
- Fix suspend/resume support on i.MX6QDL, which has a hardware
erratum that prevents use of L2 (Stefan Eichenberger)
Intel VMD host bridge driver:
- Add 0xb60b and 0xb06f Device IDs for client SKUs (Nirmal Patel)
MediaTek PCIe Gen3 controller driver:
- Update mediatek-gen3 DT binding to require the exact number of
clocks for each SoC (Fei Shao)
- Add support for DT 'max-link-speed' and 'num-lanes' properties to
restrict the link speed and width (AngeloGioacchino Del Regno)
Microchip PolarFlare PCIe controller driver:
- Add DT and driver support for using either of the two PolarFire
Root Ports (Conor Dooley)
NVIDIA Tegra194 PCIe controller driver:
- Move endpoint controller cleanups that depend on refclk from the
host to the notifier that tells us the host has deasserted PERST#,
when refclk should be valid (Manivannan Sadhasivam)
Qualcomm PCIe controller driver:
- Add qcom SAR2130P DT binding with an additional clock (Dmitry
Baryshkov)
- Enable MSI interrupts if 'global' IRQ is supported, since a
previous commit unintentionally masked them (Manivannan Sadhasivam)
- Move endpoint controller cleanups that depend on refclk from the
host to the notifier that tells us the host has deasserted PERST#,
when refclk should be valid (Manivannan Sadhasivam)
- Add DT binding and driver support for IPQ9574, with Synopsys IP
v5.80a and Qcom IP 1.27.0 (devi priya)
- Move the OPP "operating-points-v2" table from the
qcom,pcie-sm8450.yaml DT binding to qcom,pcie-common.yaml, where it
can be used by other Qcom platforms (Qiang Yu)
- Add 'global' SPI interrupt for events like link-up, link-down to
qcom,pcie-x1e80100 DT binding so we can start enumeration when the
link comes up (Qiang Yu)
- Disable ASPM L0s for qcom,pcie-x1e80100 since the PHY is not tuned
to support this (Qiang Yu)
- Add ops_1_21_0 for SC8280X family SoC, which doesn't use the
'iommu-map' DT property and doesn't need BDF-to-SID translation
(Qiang Yu)
Rockchip PCIe controller driver:
- Define ROCKCHIP_PCIE_AT_SIZE_ALIGN to replace magic 256 endpoint
.align value (Damien Le Moal)
- When unmapping an endpoint window, compute the region index instead
of searching for it, and verify that the address was mapped (Damien
Le Moal)
- When mapping an endpoint window, verify that the address hasn't
been mapped already (Damien Le Moal)
- Implement pci_epc_ops.align_addr() for rockchip-ep (Damien Le Moal)
- Fix MSI IRQ data mapping to observe the alignment constraint, which
fixes intermittent page faults in memcpy_toio() and memcpy_fromio()
(Damien Le Moal)
- Rename rockchip_pcie_parse_ep_dt() to
rockchip_pcie_ep_get_resources() for consistency with similar DT
interfaces (Damien Le Moal)
- Skip the unnecessary link train in rockchip_pcie_ep_probe() and do
it only in the endpoint start operation (Damien Le Moal)
- Implement pci_epc_ops.stop_link() to disable link training and
controller configuration (Damien Le Moal)
- Attempt link training at 5 GT/s when both partners support it
(Damien Le Moal)
- Add a handler for PERST# signal so we can detect host-initiated
resets and start link training after PERST# is deasserted (Damien
Le Moal)
Synopsys DesignWare PCIe controller driver:
- Clear outbound address on unmap so dw_pcie_find_index() won't match
an ATU index that was already unmapped (Damien Le Moal)
- Use of_property_present() instead of of_property_read_bool() when
testing for presence of non-boolean DT properties (Rob Herring)
- Advertise 1MB size if endpoint supports Resizable BARs, which was
inadvertently lost in v6.11 (Niklas Cassel)
TI J721E PCIe driver:
- Add PCIe support for J722S SoC (Siddharth Vadapalli)
- Delay PCIE_T_PVPERL_MS (100 ms), not just PCIE_T_PERST_CLK_US (100
us), before deasserting PERST# to ensure power and refclk are
stable (Siddharth Vadapalli)
TI Keystone PCIe controller driver:
- Set the 'ti,keystone-pcie' mode so v3.65a devices work in Root
Complex mode (Kishon Vijay Abraham I)
- Try to avoid unrecoverable SError for attempts to issue config
transactions when the link is down; this is racy but the best we
can do (Kishon Vijay Abraham I)
Miscellaneous:
- Reorganize kerneldoc parameter names to match order in function
signature (Julia Lawall)
- Fix sysfs reset_method_store() memory leak (Todd Kjos)
- Simplify pci_create_slot() (Ilpo Järvinen)
- Fix incorrect printf format specifiers in pcitest (Luo Yifan)"
* tag 'pci-v6.13-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (127 commits)
PCI: rockchip-ep: Handle PERST# signal in EP mode
PCI: rockchip-ep: Improve link training
PCI: rockship-ep: Implement the pci_epc_ops::stop_link() operation
PCI: rockchip-ep: Refactor endpoint link training enable
PCI: rockchip-ep: Refactor rockchip_pcie_ep_probe() MSI-X hiding
PCI: rockchip-ep: Refactor rockchip_pcie_ep_probe() memory allocations
PCI: rockchip-ep: Rename rockchip_pcie_parse_ep_dt()
PCI: rockchip-ep: Fix MSI IRQ data mapping
PCI: rockchip-ep: Implement the pci_epc_ops::align_addr() operation
PCI: rockchip-ep: Improve rockchip_pcie_ep_map_addr()
PCI: rockchip-ep: Improve rockchip_pcie_ep_unmap_addr()
PCI: rockchip-ep: Use a macro to define EP controller .align feature
PCI: rockchip-ep: Fix address translation unit programming
PCI/pwrctrl: Rename pwrctrl functions and structures
PCI/pwrctrl: Rename pwrctl files to pwrctrl
PCI/pwrctl: Remove pwrctl device without iterating over all children of pwrctl parent
PCI/pwrctl: Ensure that pwrctl drivers are probed before PCI client drivers
PCI/pwrctl: Create pwrctl device only if at least one power supply is present
PCI/pwrctl: Use of_platform_device_create() to create pwrctl devices
tools: PCI: Fix incorrect printf format specifiers
...
Add the build support for using Clang's Propeller optimizer. Like
AutoFDO, Propeller uses hardware sampling to gather information
about the frequency of execution of different code paths within a
binary. This information is then used to guide the compiler's
optimization decisions, resulting in a more efficient binary.
The support requires a Clang compiler LLVM 19 or later, and the
create_llvm_prof tool
(https://github.com/google/autofdo/releases/tag/v0.30.1). This
commit is limited to x86 platforms that support PMU features
like LBR on Intel machines and AMD Zen3 BRS.
Here is an example workflow for building an AutoFDO+Propeller
optimized kernel:
1) Build the kernel on the host machine, with AutoFDO and Propeller
build config
CONFIG_AUTOFDO_CLANG=y
CONFIG_PROPELLER_CLANG=y
then
$ make LLVM=1 CLANG_AUTOFDO_PROFILE=<autofdo_profile>
“<autofdo_profile>” is the profile collected when doing a non-Propeller
AutoFDO build. This step builds a kernel that has the same optimization
level as AutoFDO, plus a metadata section that records basic block
information. This kernel image runs as fast as an AutoFDO optimized
kernel.
2) Install the kernel on test/production machines.
3) Run the load tests. The '-c' option in perf specifies the sample
event period. We suggest using a suitable prime number,
like 500009, for this purpose.
For Intel platforms:
$ perf record -e BR_INST_RETIRED.NEAR_TAKEN:k -a -N -b -c <count> \
-o <perf_file> -- <loadtest>
For AMD platforms:
The supported system are: Zen3 with BRS, or Zen4 with amd_lbr_v2
# To see if Zen3 support LBR:
$ cat proc/cpuinfo | grep " brs"
# To see if Zen4 support LBR:
$ cat proc/cpuinfo | grep amd_lbr_v2
# If the result is yes, then collect the profile using:
$ perf record --pfm-events RETIRED_TAKEN_BRANCH_INSTRUCTIONS:k -a \
-N -b -c <count> -o <perf_file> -- <loadtest>
4) (Optional) Download the raw perf file to the host machine.
5) Generate Propeller profile:
$ create_llvm_prof --binary=<vmlinux> --profile=<perf_file> \
--format=propeller --propeller_output_module_name \
--out=<propeller_profile_prefix>_cc_profile.txt \
--propeller_symorder=<propeller_profile_prefix>_ld_profile.txt
“create_llvm_prof” is the profile conversion tool, and a prebuilt
binary for linux can be found on
https://github.com/google/autofdo/releases/tag/v0.30.1 (can also build
from source).
"<propeller_profile_prefix>" can be something like
"/home/user/dir/any_string".
This command generates a pair of Propeller profiles:
"<propeller_profile_prefix>_cc_profile.txt" and
"<propeller_profile_prefix>_ld_profile.txt".
6) Rebuild the kernel using the AutoFDO and Propeller profile files.
CONFIG_AUTOFDO_CLANG=y
CONFIG_PROPELLER_CLANG=y
and
$ make LLVM=1 CLANG_AUTOFDO_PROFILE=<autofdo_profile> \
CLANG_PROPELLER_PROFILE_PREFIX=<propeller_profile_prefix>
Co-developed-by: Han Shen <shenhan@google.com>
Signed-off-by: Han Shen <shenhan@google.com>
Signed-off-by: Rong Xu <xur@google.com>
Suggested-by: Sriraman Tallam <tmsriram@google.com>
Suggested-by: Krzysztof Pszeniczny <kpszeniczny@google.com>
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Suggested-by: Stephane Eranian <eranian@google.com>
Tested-by: Yonghong Song <yonghong.song@linux.dev>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Kees Cook <kees@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
perf record
-----------
* Enable leader sampling for inherited task events. It was supported
only for system-wide events but the kernel started to support such a
setup since v6.12.
This is to reduce the number of PMU interrupts. The samples of the
leader event will contain counts of other events and no samples will
be generated for the other member events.
$ perf record -e '{cycles,instructions}:S' ${MYPROG}
perf report
-----------
* Fix --branch-history option to display more branch-related information
like prediction, abort and cycles which is available on Intel machines.
$ perf record -bg -- perf test -w brstack
$ perf report --branch-history
...
#
# Overhead Source:Line Symbol Shared Object Predicted Abort Cycles IPC [IPC Coverage]
# ........ ........................ .............. .................... ......... ..... ...... ....................
#
8.17% copy_page_64.S:19 [k] copy_page [kernel.kallsyms] 50.0% 0 5 - -
|
---xas_load xarray.h:171
|
|--5.68%--xas_load xarray.c:245 (cycles:1)
| xas_load xarray.c:242
| xas_load xarray.h:1260 (cycles:1)
| xas_descend xarray.c:146
| xas_load xarray.c:244 (cycles:2)
| xas_load xarray.c:245
| xas_descend xarray.c:218 (cycles:10)
...
perf stat
---------
* Add HWMON PMU support. The HWMON provides various system information
like CPU/GPU temperature, fan speed and so on. Expose them as PMU
events so that users can see the values using perf stat commands.
$ perf stat -e temp_cpu,fan1 true
Performance counter stats for 'true':
60.00 'C temp_cpu
0 rpm fan1
0.000745382 seconds time elapsed
0.000883000 seconds user
0.000000000 seconds sys
* Display metric threshold in JSON output. Some metrics define
thresholds to classify value ranges. It used to be in a different
color but it won't work for JSON. Add "metric-threshold" field to
the JSON that can be one of "good", "less good", "nearly bad" and
"bad".
# perf stat -a -M TopdownL1 -j true
{"counter-value" : "18693525.000000", "unit" : "", "event" : "TOPDOWN.SLOTS", "event-runtime" : 5552708, "pcnt-running" : 100.00, "metric-value" : "43.226002", "metric-unit" : "% tma_backend_bound", "metric-threshold" : "bad"}
{"metric-value" : "29.212267", "metric-unit" : "% tma_frontend_bound", "metric-threshold" : "bad"}
{"metric-value" : "7.138972", "metric-unit" : "% tma_bad_speculation", "metric-threshold" : "good"}
{"metric-value" : "20.422759", "metric-unit" : "% tma_retiring", "metric-threshold" : "good"}
{"counter-value" : "3817732.000000", "unit" : "", "event" : "topdown-retiring", "event-runtime" : 5552708, "pcnt-running" : 100.00, }
{"counter-value" : "5472824.000000", "unit" : "", "event" : "topdown-fe-bound", "event-runtime" : 5552708, "pcnt-running" : 100.00, }
{"counter-value" : "7984780.000000", "unit" : "", "event" : "topdown-be-bound", "event-runtime" : 5552708, "pcnt-running" : 100.00, }
{"counter-value" : "1418181.000000", "unit" : "", "event" : "topdown-bad-spec", "event-runtime" : 5552708, "pcnt-running" : 100.00, }
...
perf sched
----------
* Add -P/--pre-migrations option for 'timehist' sub-command to track
time a task waited on a run-queue before migrating to a different CPU.
$ perf sched timehist -P
time cpu task name wait time sch delay run time pre-mig time
[tid/pid] (msec) (msec) (msec) (msec)
--------------- ------ ------------------------------ --------- --------- --------- ---------
585940.535527 [0000] perf[584885] 0.000 0.000 0.000 0.000
585940.535535 [0000] migration/0[20] 0.000 0.002 0.008 0.000
585940.535559 [0001] perf[584885] 0.000 0.000 0.000 0.000
585940.535563 [0001] migration/1[25] 0.000 0.001 0.004 0.000
585940.535678 [0002] perf[584885] 0.000 0.000 0.000 0.000
585940.535686 [0002] migration/2[31] 0.000 0.002 0.008 0.000
585940.535905 [0001] <idle> 0.000 0.000 0.342 0.000
585940.535938 [0003] perf[584885] 0.000 0.000 0.000 0.000
585940.537048 [0001] sleep[584886] 0.000 0.019 1.142 0.001
585940.537749 [0002] <idle> 0.000 0.000 2.062 0.000
...
Build
-----
* Make libunwind opt-in (LIBUNWIND=1) rather than opt-out. The perf
tools are generally built with libelf and libdw which has unwinder
functionality. The libunwind support predates it and no need to
have duplicate unwinders by default.
* Rename NO_DWARF=1 build option to NO_LIBDW=1 in order to clarify it's
using libdw for handling DWARF information.
Internals
---------
* Do not set exclude_guest bit in the perf_event_attr by default. This
was causing a trouble in AMD IBS PMU as it doesn't support the bit.
The bit will be set when it's needed later by the fallback logic.
Also update the missing feature detection logic to make sure not clear
supported bits unnecessarily.
* Run perf test in parallel by default and mark flaky tests "exclusive"
to run them serially at the end. Some test numbers are changed but
the test can complete in less than half the time.
JSON vendor events
------------------
* Add AMD Zen 5 events and metrics.
* Add i.MX91 and i.MX95 DDR metrics
* Fix HiSilicon HIP08 Topdown metric name.
* Support compat events on PowerPC.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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Merge tag 'perf-tools-for-v6.13-2024-11-24' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools
Pull perf tools updates from Namhyung Kim:
"perf record:
- Enable leader sampling for inherited task events. It was supported
only for system-wide events but the kernel started to support such
a setup since v6.12.
This is to reduce the number of PMU interrupts. The samples of the
leader event will contain counts of other events and no samples
will be generated for the other member events.
$ perf record -e '{cycles,instructions}:S' ${MYPROG}
perf report:
- Fix --branch-history option to display more branch-related
information like prediction, abort and cycles which is available
on Intel machines.
$ perf record -bg -- perf test -w brstack
$ perf report --branch-history
...
#
# Overhead Source:Line Symbol Shared Object Predicted Abort Cycles IPC [IPC Coverage]
# ........ ........................ .............. .................... ......... ..... ...... ....................
#
8.17% copy_page_64.S:19 [k] copy_page [kernel.kallsyms] 50.0% 0 5 - -
|
---xas_load xarray.h:171
|
|--5.68%--xas_load xarray.c:245 (cycles:1)
| xas_load xarray.c:242
| xas_load xarray.h:1260 (cycles:1)
| xas_descend xarray.c:146
| xas_load xarray.c:244 (cycles:2)
| xas_load xarray.c:245
| xas_descend xarray.c:218 (cycles:10)
...
perf stat:
- Add HWMON PMU support.
The HWMON provides various system information like CPU/GPU
temperature, fan speed and so on. Expose them as PMU events so that
users can see the values using perf stat commands.
$ perf stat -e temp_cpu,fan1 true
Performance counter stats for 'true':
60.00 'C temp_cpu
0 rpm fan1
0.000745382 seconds time elapsed
0.000883000 seconds user
0.000000000 seconds sys
- Display metric threshold in JSON output.
Some metrics define thresholds to classify value ranges. It used to
be in a different color but it won't work for JSON.
Add "metric-threshold" field to the JSON that can be one of "good",
"less good", "nearly bad" and "bad".
# perf stat -a -M TopdownL1 -j true
{"counter-value" : "18693525.000000", "unit" : "", "event" : "TOPDOWN.SLOTS", "event-runtime" : 5552708, "pcnt-running" : 100.00, "metric-value" : "43.226002", "metric-unit" : "% tma_backend_bound", "metric-threshold" : "bad"}
{"metric-value" : "29.212267", "metric-unit" : "% tma_frontend_bound", "metric-threshold" : "bad"}
{"metric-value" : "7.138972", "metric-unit" : "% tma_bad_speculation", "metric-threshold" : "good"}
{"metric-value" : "20.422759", "metric-unit" : "% tma_retiring", "metric-threshold" : "good"}
{"counter-value" : "3817732.000000", "unit" : "", "event" : "topdown-retiring", "event-runtime" : 5552708, "pcnt-running" : 100.00, }
{"counter-value" : "5472824.000000", "unit" : "", "event" : "topdown-fe-bound", "event-runtime" : 5552708, "pcnt-running" : 100.00, }
{"counter-value" : "7984780.000000", "unit" : "", "event" : "topdown-be-bound", "event-runtime" : 5552708, "pcnt-running" : 100.00, }
{"counter-value" : "1418181.000000", "unit" : "", "event" : "topdown-bad-spec", "event-runtime" : 5552708, "pcnt-running" : 100.00, }
...
perf sched:
- Add -P/--pre-migrations option for 'timehist' sub-command to track
time a task waited on a run-queue before migrating to a different
CPU.
$ perf sched timehist -P
time cpu task name wait time sch delay run time pre-mig time
[tid/pid] (msec) (msec) (msec) (msec)
--------------- ------ ------------------------------ --------- --------- --------- ---------
585940.535527 [0000] perf[584885] 0.000 0.000 0.000 0.000
585940.535535 [0000] migration/0[20] 0.000 0.002 0.008 0.000
585940.535559 [0001] perf[584885] 0.000 0.000 0.000 0.000
585940.535563 [0001] migration/1[25] 0.000 0.001 0.004 0.000
585940.535678 [0002] perf[584885] 0.000 0.000 0.000 0.000
585940.535686 [0002] migration/2[31] 0.000 0.002 0.008 0.000
585940.535905 [0001] <idle> 0.000 0.000 0.342 0.000
585940.535938 [0003] perf[584885] 0.000 0.000 0.000 0.000
585940.537048 [0001] sleep[584886] 0.000 0.019 1.142 0.001
585940.537749 [0002] <idle> 0.000 0.000 2.062 0.000
...
Build:
- Make libunwind opt-in (LIBUNWIND=1) rather than opt-out.
The perf tools are generally built with libelf and libdw which has
unwinder functionality. The libunwind support predates it and no
need to have duplicate unwinders by default.
- Rename NO_DWARF=1 build option to NO_LIBDW=1 in order to clarify
it's using libdw for handling DWARF information.
Internals:
- Do not set exclude_guest bit in the perf_event_attr by default.
This was causing a trouble in AMD IBS PMU as it doesn't support the
bit. The bit will be set when it's needed later by the fallback
logic. Also update the missing feature detection logic to make sure
not clear supported bits unnecessarily.
- Run perf test in parallel by default and mark flaky tests
"exclusive" to run them serially at the end. Some test numbers are
changed but the test can complete in less than half the time.
JSON vendor events:
- Add AMD Zen 5 events and metrics.
- Add i.MX91 and i.MX95 DDR metrics
- Fix HiSilicon HIP08 Topdown metric name.
- Support compat events on PowerPC"
* tag 'perf-tools-for-v6.13-2024-11-24' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: (232 commits)
perf tests: Fix hwmon parsing with PMU name test
perf hwmon_pmu: Ensure hwmon key union is zeroed before use
perf tests hwmon_pmu: Remove double evlist__delete()
perf/test: fix perf ftrace test on s390
perf bpf-filter: Return -ENOMEM directly when pfi allocation fails
perf test: Correct hwmon test PMU detection
perf: Remove unused del_perf_probe_events()
perf pmu: Move pmu_metrics_table__find and remove ARM override
perf jevents: Add map_for_cpu()
perf header: Pass a perf_cpu rather than a PMU to get_cpuid_str
perf header: Avoid transitive PMU includes
perf arm64 header: Use cpu argument in get_cpuid
perf header: Refactor get_cpuid to take a CPU for ARM
perf header: Move is_cpu_online to numa bench
perf jevents: fix breakage when do perf stat on system metric
perf test: Add missing __exit calls in tool/hwmon tests
perf tests: Make leader sampling test work without branch event
perf util: Remove kernel version deadcode
perf test shell trace_exit_race: Use --no-comm to avoid cases where COMM isn't resolved
perf test shell trace_exit_race: Show what went wrong in verbose mode
...
Jeff Layton contributed a scalability improvement to NFSD's NFSv4
backchannel session implementation. This improvement is intended to
increase the rate at which NFSD can safely recall NFSv4 delegations
from clients, to avoid the need to revoke them. Revoking requires
a slow state recovery process.
A wide variety of bug fixes and other incremental improvements make
up the bulk of commits in this series. As always I am grateful to
the NFSD contributors, reviewers, testers, and bug reporters who
participated during this cycle.
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Merge tag 'nfsd-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
Pull nfsd updates from Chuck Lever:
"Jeff Layton contributed a scalability improvement to NFSD's NFSv4
backchannel session implementation. This improvement is intended to
increase the rate at which NFSD can safely recall NFSv4 delegations
from clients, to avoid the need to revoke them. Revoking requires a
slow state recovery process.
A wide variety of bug fixes and other incremental improvements make up
the bulk of commits in this series. As always I am grateful to the
NFSD contributors, reviewers, testers, and bug reporters who
participated during this cycle"
* tag 'nfsd-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: (72 commits)
nfsd: allow for up to 32 callback session slots
nfs_common: must not hold RCU while calling nfsd_file_put_local
nfsd: get rid of include ../internal.h
nfsd: fix nfs4_openowner leak when concurrent nfsd4_open occur
NFSD: Add nfsd4_copy time-to-live
NFSD: Add a laundromat reaper for async copy state
NFSD: Block DESTROY_CLIENTID only when there are ongoing async COPY operations
NFSD: Handle an NFS4ERR_DELAY response to CB_OFFLOAD
NFSD: Free async copy information in nfsd4_cb_offload_release()
NFSD: Fix nfsd4_shutdown_copy()
NFSD: Add a tracepoint to record canceled async COPY operations
nfsd: make nfsd4_session->se_flags a bool
nfsd: remove nfsd4_session->se_bchannel
nfsd: make use of warning provided by refcount_t
nfsd: Don't fail OP_SETCLIENTID when there are too many clients.
svcrdma: fix miss destroy percpu_counter in svc_rdma_proc_init()
xdrgen: Remove program_stat_to_errno() call sites
xdrgen: Update the files included in client-side source code
xdrgen: Remove check for "nfs_ok" in C templates
xdrgen: Remove tracepoint call site
...
Bring in an overlayfs fix for v6.13-rc1 that fixes a bug introduced by
the overlayfs changes merged for v6.13.
Signed-off-by: Christian Brauner <brauner@kernel.org>
Add a test to check the temporary address could be added/removed
correctly when mngtempaddr is set or removed/unmanaged.
Signed-off-by: Sam Edwards <cfsworks@gmail.com>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
A few updates for the 6.13 kernel, including some typo corrections in the
software stack and some fixes for tools. Additionally, it includes a
change resulting from the deprecation of a kernel API in the PCI
subsystem.
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Merge tag 'firewire-updates-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394
Pull firewire updates from Takashi Sakamoto:
"A few updates for the 6.13 kernel, including some typo corrections in
the software stack and some fixes for tools. Additionally, it includes
a change resulting from the deprecation of a kernel API in the PCI
subsystem"
* tag 'firewire-updates-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
tools/firewire: Fix several incorrect format specifiers
firewire: ohci: Replace deprecated PCI functions
firewire: Correct some typos
performs some cleanups in the resource management code.
- The series "Improve the copy of task comm" from Yafang Shao addresses
possible race-induced overflows in the management of task_struct.comm[].
- The series "Remove unnecessary header includes from
{tools/}lib/list_sort.c" from Kuan-Wei Chiu adds some cleanups and a
small fix to the list_sort library code and to its selftest.
- The series "Enhance min heap API with non-inline functions and
optimizations" also from Kuan-Wei Chiu optimizes and cleans up the
min_heap library code.
- The series "nilfs2: Finish folio conversion" from Ryusuke Konishi
finishes off nilfs2's folioification.
- The series "add detect count for hung tasks" from Lance Yang adds more
userspace visibility into the hung-task detector's activity.
- Apart from that, singelton patches in many places - please see the
individual changelogs for details.
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Merge tag 'mm-nonmm-stable-2024-11-24-02-05' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull non-MM updates from Andrew Morton:
- The series "resource: A couple of cleanups" from Andy Shevchenko
performs some cleanups in the resource management code
- The series "Improve the copy of task comm" from Yafang Shao addresses
possible race-induced overflows in the management of
task_struct.comm[]
- The series "Remove unnecessary header includes from
{tools/}lib/list_sort.c" from Kuan-Wei Chiu adds some cleanups and a
small fix to the list_sort library code and to its selftest
- The series "Enhance min heap API with non-inline functions and
optimizations" also from Kuan-Wei Chiu optimizes and cleans up the
min_heap library code
- The series "nilfs2: Finish folio conversion" from Ryusuke Konishi
finishes off nilfs2's folioification
- The series "add detect count for hung tasks" from Lance Yang adds
more userspace visibility into the hung-task detector's activity
- Apart from that, singelton patches in many places - please see the
individual changelogs for details
* tag 'mm-nonmm-stable-2024-11-24-02-05' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (71 commits)
gdb: lx-symbols: do not error out on monolithic build
kernel/reboot: replace sprintf() with sysfs_emit()
lib: util_macros_kunit: add kunit test for util_macros.h
util_macros.h: fix/rework find_closest() macros
Improve consistency of '#error' directive messages
ocfs2: fix uninitialized value in ocfs2_file_read_iter()
hung_task: add docs for hung_task_detect_count
hung_task: add detect count for hung tasks
dma-buf: use atomic64_inc_return() in dma_buf_getfile()
fs/proc/kcore.c: fix coccinelle reported ERROR instances
resource: avoid unnecessary resource tree walking in __region_intersects()
ocfs2: remove unused errmsg function and table
ocfs2: cluster: fix a typo
lib/scatterlist: use sg_phys() helper
checkpatch: always parse orig_commit in fixes tag
nilfs2: convert metadata aops from writepage to writepages
nilfs2: convert nilfs_recovery_copy_block() to take a folio
nilfs2: convert nilfs_page_count_clean_buffers() to take a folio
nilfs2: remove nilfs_writepage
nilfs2: convert checkpoint file to be folio-based
...
This reverts commit 6fd47effe9, and the related self-test update
commit e14e0eaeb0 ("selftests/hid: add test for assigning a given
device to hid-generic").
It results in things like the scroll wheel on Logitech mice not working
after a reboot due to the kernel being confused about the state of the
high-resolution mode.
Quoting Benjamin Tissoires:
"The idea of 6fd47effe9 was to be able to call hid_bpf_rdesc_fixup()
once per reprobe of the device.
However, because the bpf filter can now change the quirk value, the
call had to be moved before the driver gets bound (which was
previously ensuring the unicity of the call).
The net effect is that now, in the case hid-generic gets loaded first
and then the specific driver gets loaded once the disk is available,
the value of ->quirks is not reset, but kept to the value that was set
by hid-generic (HID_QUIRK_INPUT_PER_APP).
Once hid-logitech-hidpp kicks in, that quirk is now set, which creates
two inputs for the single mouse: one keyboard for fancy shortcuts, and
one mouse node.
However, hid-logitech-hidpp expects only one input node to be attached
(it stores it into hidpp->input), and when a wheel event is received,
because there is some processing with high-resolution wheel events,
the wheel event is injected into hidpp->input.
And of course, when HID_QUIRK_INPUT_PER_APP is set, hidpp->input gets
the keyboard node, which doesn't have wheel event type, and the events
are ignored"
Reported-and-bisected-by: Mike Galbraith <efault@gmx.de>
Link: https://lore.kernel.org/all/CAHk-=wiUkQM3uheit2cNM0Y0OOY5qqspJgC8LkmOkJ2p2LDxcw@mail.gmail.com/
Acked-by: Benjamin Tissoires <bentiss@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Test that extacks in dumps work. The test fills up the receive buffer
to test both the inline dump (as part of sendmsg()) and delayed one
(run during recvmsg()).
Use YNL helpers to parse the messages. We need to add the test to YNL
file to make sure the right include path are used.
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20241119224432.1713040-2-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Replace nested double quotes in f-string with outer single quotes.
Fixes: 6116075e18 ("selftests: nic_link_layer: Add link layer selftest for NIC driver")
Signed-off-by: David Wei <dw@davidwei.uk>
Link: https://patch.msgid.link/20241122064821.2821199-1-dw@davidwei.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Compiled binary files should be added to .gitignore
'git status' complains:
Untracked files:
(use "git add <file>..." to include in what will be committed)
alsa/global-timer
alsa/utimer-test
Cc: Mark Brown <broonie@kernel.org>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
Link: https://patch.msgid.link/20241122073600.1530791-1-lizhijian@fujitsu.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
essentially guessing which pfns are refcounted pages. The reason to
do so was that KVM needs to map both non-refcounted pages (for example
BARs of VFIO devices) and VM_PFNMAP/VM_MIXMEDMAP VMAs that contain
refcounted pages. However, the result was security issues in the past,
and more recently the inability to map VM_IO and VM_PFNMAP memory
that _is_ backed by struct page but is not refcounted. In particular
this broke virtio-gpu blob resources (which directly map host graphics
buffers into the guest as "vram" for the virtio-gpu device) with the
amdgpu driver, because amdgpu allocates non-compound higher order pages
and the tail pages could not be mapped into KVM.
This requires adjusting all uses of struct page in the per-architecture
code, to always work on the pfn whenever possible. The large series that
did this, from David Stevens and Sean Christopherson, also cleaned up
substantially the set of functions that provided arch code with the
pfn for a host virtual addresses. The previous maze of twisty little
passages, all different, is replaced by five functions (__gfn_to_page,
__kvm_faultin_pfn, the non-__ versions of these two, and kvm_prefetch_pages)
saving almost 200 lines of code.
ARM:
* Support for stage-1 permission indirection (FEAT_S1PIE) and
permission overlays (FEAT_S1POE), including nested virt + the
emulated page table walker
* Introduce PSCI SYSTEM_OFF2 support to KVM + client driver. This call
was introduced in PSCIv1.3 as a mechanism to request hibernation,
similar to the S4 state in ACPI
* Explicitly trap + hide FEAT_MPAM (QoS controls) from KVM guests. As
part of it, introduce trivial initialization of the host's MPAM
context so KVM can use the corresponding traps
* PMU support under nested virtualization, honoring the guest
hypervisor's trap configuration and event filtering when running a
nested guest
* Fixes to vgic ITS serialization where stale device/interrupt table
entries are not zeroed when the mapping is invalidated by the VM
* Avoid emulated MMIO completion if userspace has requested synchronous
external abort injection
* Various fixes and cleanups affecting pKVM, vCPU initialization, and
selftests
LoongArch:
* Add iocsr and mmio bus simulation in kernel.
* Add in-kernel interrupt controller emulation.
* Add support for virtualization extensions to the eiointc irqchip.
PPC:
* Drop lingering and utterly obsolete references to PPC970 KVM, which was
removed 10 years ago.
* Fix incorrect documentation references to non-existing ioctls
RISC-V:
* Accelerate KVM RISC-V when running as a guest
* Perf support to collect KVM guest statistics from host side
s390:
* New selftests: more ucontrol selftests and CPU model sanity checks
* Support for the gen17 CPU model
* List registers supported by KVM_GET/SET_ONE_REG in the documentation
x86:
* Cleanup KVM's handling of Accessed and Dirty bits to dedup code, improve
documentation, harden against unexpected changes. Even if the hardware
A/D tracking is disabled, it is possible to use the hardware-defined A/D
bits to track if a PFN is Accessed and/or Dirty, and that removes a lot
of special cases.
* Elide TLB flushes when aging secondary PTEs, as has been done in x86's
primary MMU for over 10 years.
* Recover huge pages in-place in the TDP MMU when dirty page logging is
toggled off, instead of zapping them and waiting until the page is
re-accessed to create a huge mapping. This reduces vCPU jitter.
* Batch TLB flushes when dirty page logging is toggled off. This reduces
the time it takes to disable dirty logging by ~3x.
* Remove the shrinker that was (poorly) attempting to reclaim shadow page
tables in low-memory situations.
* Clean up and optimize KVM's handling of writes to MSR_IA32_APICBASE.
* Advertise CPUIDs for new instructions in Clearwater Forest
* Quirk KVM's misguided behavior of initialized certain feature MSRs to
their maximum supported feature set, which can result in KVM creating
invalid vCPU state. E.g. initializing PERF_CAPABILITIES to a non-zero
value results in the vCPU having invalid state if userspace hides PDCM
from the guest, which in turn can lead to save/restore failures.
* Fix KVM's handling of non-canonical checks for vCPUs that support LA57
to better follow the "architecture", in quotes because the actual
behavior is poorly documented. E.g. most MSR writes and descriptor
table loads ignore CR4.LA57 and operate purely on whether the CPU
supports LA57.
* Bypass the register cache when querying CPL from kvm_sched_out(), as
filling the cache from IRQ context is generally unsafe; harden the
cache accessors to try to prevent similar issues from occuring in the
future. The issue that triggered this change was already fixed in 6.12,
but was still kinda latent.
* Advertise AMD_IBPB_RET to userspace, and fix a related bug where KVM
over-advertises SPEC_CTRL when trying to support cross-vendor VMs.
* Minor cleanups
* Switch hugepage recovery thread to use vhost_task. These kthreads can
consume significant amounts of CPU time on behalf of a VM or in response
to how the VM behaves (for example how it accesses its memory); therefore
KVM tried to place the thread in the VM's cgroups and charge the CPU
time consumed by that work to the VM's container. However the kthreads
did not process SIGSTOP/SIGCONT, and therefore cgroups which had KVM
instances inside could not complete freezing. Fix this by replacing the
kthread with a PF_USER_WORKER thread, via the vhost_task abstraction.
Another 100+ lines removed, with generally better behavior too like
having these threads properly parented in the process tree.
* Revert a workaround for an old CPU erratum (Nehalem/Westmere) that didn't
really work; there was really nothing to work around anyway: the broken
patch was meant to fix nested virtualization, but the PERF_GLOBAL_CTRL
MSR is virtualized and therefore unaffected by the erratum.
* Fix 6.12 regression where CONFIG_KVM will be built as a module even
if asked to be builtin, as long as neither KVM_INTEL nor KVM_AMD is 'y'.
x86 selftests:
* x86 selftests can now use AVX.
Documentation:
* Use rST internal links
* Reorganize the introduction to the API document
Generic:
* Protect vcpu->pid accesses outside of vcpu->mutex with a rwlock instead
of RCU, so that running a vCPU on a different task doesn't encounter long
due to having to wait for all CPUs become quiescent. In general both reads
and writes are rare, but userspace that supports confidential computing is
introducing the use of "helper" vCPUs that may jump from one host processor
to another. Those will be very happy to trigger a synchronize_rcu(), and
the effect on performance is quite the disaster.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm updates from Paolo Bonzini:
"The biggest change here is eliminating the awful idea that KVM had of
essentially guessing which pfns are refcounted pages.
The reason to do so was that KVM needs to map both non-refcounted
pages (for example BARs of VFIO devices) and VM_PFNMAP/VM_MIXMEDMAP
VMAs that contain refcounted pages.
However, the result was security issues in the past, and more recently
the inability to map VM_IO and VM_PFNMAP memory that _is_ backed by
struct page but is not refcounted. In particular this broke virtio-gpu
blob resources (which directly map host graphics buffers into the
guest as "vram" for the virtio-gpu device) with the amdgpu driver,
because amdgpu allocates non-compound higher order pages and the tail
pages could not be mapped into KVM.
This requires adjusting all uses of struct page in the
per-architecture code, to always work on the pfn whenever possible.
The large series that did this, from David Stevens and Sean
Christopherson, also cleaned up substantially the set of functions
that provided arch code with the pfn for a host virtual addresses.
The previous maze of twisty little passages, all different, is
replaced by five functions (__gfn_to_page, __kvm_faultin_pfn, the
non-__ versions of these two, and kvm_prefetch_pages) saving almost
200 lines of code.
ARM:
- Support for stage-1 permission indirection (FEAT_S1PIE) and
permission overlays (FEAT_S1POE), including nested virt + the
emulated page table walker
- Introduce PSCI SYSTEM_OFF2 support to KVM + client driver. This
call was introduced in PSCIv1.3 as a mechanism to request
hibernation, similar to the S4 state in ACPI
- Explicitly trap + hide FEAT_MPAM (QoS controls) from KVM guests. As
part of it, introduce trivial initialization of the host's MPAM
context so KVM can use the corresponding traps
- PMU support under nested virtualization, honoring the guest
hypervisor's trap configuration and event filtering when running a
nested guest
- Fixes to vgic ITS serialization where stale device/interrupt table
entries are not zeroed when the mapping is invalidated by the VM
- Avoid emulated MMIO completion if userspace has requested
synchronous external abort injection
- Various fixes and cleanups affecting pKVM, vCPU initialization, and
selftests
LoongArch:
- Add iocsr and mmio bus simulation in kernel.
- Add in-kernel interrupt controller emulation.
- Add support for virtualization extensions to the eiointc irqchip.
PPC:
- Drop lingering and utterly obsolete references to PPC970 KVM, which
was removed 10 years ago.
- Fix incorrect documentation references to non-existing ioctls
RISC-V:
- Accelerate KVM RISC-V when running as a guest
- Perf support to collect KVM guest statistics from host side
s390:
- New selftests: more ucontrol selftests and CPU model sanity checks
- Support for the gen17 CPU model
- List registers supported by KVM_GET/SET_ONE_REG in the
documentation
x86:
- Cleanup KVM's handling of Accessed and Dirty bits to dedup code,
improve documentation, harden against unexpected changes.
Even if the hardware A/D tracking is disabled, it is possible to
use the hardware-defined A/D bits to track if a PFN is Accessed
and/or Dirty, and that removes a lot of special cases.
- Elide TLB flushes when aging secondary PTEs, as has been done in
x86's primary MMU for over 10 years.
- Recover huge pages in-place in the TDP MMU when dirty page logging
is toggled off, instead of zapping them and waiting until the page
is re-accessed to create a huge mapping. This reduces vCPU jitter.
- Batch TLB flushes when dirty page logging is toggled off. This
reduces the time it takes to disable dirty logging by ~3x.
- Remove the shrinker that was (poorly) attempting to reclaim shadow
page tables in low-memory situations.
- Clean up and optimize KVM's handling of writes to
MSR_IA32_APICBASE.
- Advertise CPUIDs for new instructions in Clearwater Forest
- Quirk KVM's misguided behavior of initialized certain feature MSRs
to their maximum supported feature set, which can result in KVM
creating invalid vCPU state. E.g. initializing PERF_CAPABILITIES to
a non-zero value results in the vCPU having invalid state if
userspace hides PDCM from the guest, which in turn can lead to
save/restore failures.
- Fix KVM's handling of non-canonical checks for vCPUs that support
LA57 to better follow the "architecture", in quotes because the
actual behavior is poorly documented. E.g. most MSR writes and
descriptor table loads ignore CR4.LA57 and operate purely on
whether the CPU supports LA57.
- Bypass the register cache when querying CPL from kvm_sched_out(),
as filling the cache from IRQ context is generally unsafe; harden
the cache accessors to try to prevent similar issues from occuring
in the future. The issue that triggered this change was already
fixed in 6.12, but was still kinda latent.
- Advertise AMD_IBPB_RET to userspace, and fix a related bug where
KVM over-advertises SPEC_CTRL when trying to support cross-vendor
VMs.
- Minor cleanups
- Switch hugepage recovery thread to use vhost_task.
These kthreads can consume significant amounts of CPU time on
behalf of a VM or in response to how the VM behaves (for example
how it accesses its memory); therefore KVM tried to place the
thread in the VM's cgroups and charge the CPU time consumed by that
work to the VM's container.
However the kthreads did not process SIGSTOP/SIGCONT, and therefore
cgroups which had KVM instances inside could not complete freezing.
Fix this by replacing the kthread with a PF_USER_WORKER thread, via
the vhost_task abstraction. Another 100+ lines removed, with
generally better behavior too like having these threads properly
parented in the process tree.
- Revert a workaround for an old CPU erratum (Nehalem/Westmere) that
didn't really work; there was really nothing to work around anyway:
the broken patch was meant to fix nested virtualization, but the
PERF_GLOBAL_CTRL MSR is virtualized and therefore unaffected by the
erratum.
- Fix 6.12 regression where CONFIG_KVM will be built as a module even
if asked to be builtin, as long as neither KVM_INTEL nor KVM_AMD is
'y'.
x86 selftests:
- x86 selftests can now use AVX.
Documentation:
- Use rST internal links
- Reorganize the introduction to the API document
Generic:
- Protect vcpu->pid accesses outside of vcpu->mutex with a rwlock
instead of RCU, so that running a vCPU on a different task doesn't
encounter long due to having to wait for all CPUs become quiescent.
In general both reads and writes are rare, but userspace that
supports confidential computing is introducing the use of "helper"
vCPUs that may jump from one host processor to another. Those will
be very happy to trigger a synchronize_rcu(), and the effect on
performance is quite the disaster"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (298 commits)
KVM: x86: Break CONFIG_KVM_X86's direct dependency on KVM_INTEL || KVM_AMD
KVM: x86: add back X86_LOCAL_APIC dependency
Revert "KVM: VMX: Move LOAD_IA32_PERF_GLOBAL_CTRL errata handling out of setup_vmcs_config()"
KVM: x86: switch hugepage recovery thread to vhost_task
KVM: x86: expose MSR_PLATFORM_INFO as a feature MSR
x86: KVM: Advertise CPUIDs for new instructions in Clearwater Forest
Documentation: KVM: fix malformed table
irqchip/loongson-eiointc: Add virt extension support
LoongArch: KVM: Add irqfd support
LoongArch: KVM: Add PCHPIC user mode read and write functions
LoongArch: KVM: Add PCHPIC read and write functions
LoongArch: KVM: Add PCHPIC device support
LoongArch: KVM: Add EIOINTC user mode read and write functions
LoongArch: KVM: Add EIOINTC read and write functions
LoongArch: KVM: Add EIOINTC device support
LoongArch: KVM: Add IPI user mode read and write function
LoongArch: KVM: Add IPI read and write function
LoongArch: KVM: Add IPI device support
LoongArch: KVM: Add iocsr and mmio bus simulation in kernel
KVM: arm64: Pass on SVE mapping failures
...
- Rework kfence support for the HPT MMU to work on systems with >= 16TB of RAM.
- Remove the powerpc "maple" platform, used by the "Yellow Dog Powerstation".
- Add support for DYNAMIC_FTRACE_WITH_CALL_OPS,
DYNAMIC_FTRACE_WITH_DIRECT_CALLS & BPF Trampolines.
- Add support for running KVM nested guests on Power11.
- Other small features, cleanups and fixes.
Thanks to: Amit Machhiwal, Arnd Bergmann, Christophe Leroy, Costa Shulyupin,
David Hunter, David Wang, Disha Goel, Gautam Menghani, Geert Uytterhoeven,
Hari Bathini, Julia Lawall, Kajol Jain, Keith Packard, Lukas Bulwahn, Madhavan
Srinivasan, Markus Elfring, Michal Suchanek, Ming Lei, Mukesh Kumar Chaurasiya,
Nathan Chancellor, Naveen N Rao, Nicholas Piggin, Nysal Jan K.A, Paulo Miguel
Almeida, Pavithra Prakash, Ritesh Harjani (IBM), Rob Herring (Arm), Sachin P
Bappalige, Shen Lichuan, Simon Horman, Sourabh Jain, Thomas Weißschuh, Thorsten
Blum, Thorsten Leemhuis, Venkat Rao Bagalkote, Zhang Zekun,
zhang jiao.
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Merge tag 'powerpc-6.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Michael Ellerman:
- Rework kfence support for the HPT MMU to work on systems with >= 16TB
of RAM.
- Remove the powerpc "maple" platform, used by the "Yellow Dog
Powerstation".
- Add support for DYNAMIC_FTRACE_WITH_CALL_OPS,
DYNAMIC_FTRACE_WITH_DIRECT_CALLS & BPF Trampolines.
- Add support for running KVM nested guests on Power11.
- Other small features, cleanups and fixes.
Thanks to Amit Machhiwal, Arnd Bergmann, Christophe Leroy, Costa
Shulyupin, David Hunter, David Wang, Disha Goel, Gautam Menghani, Geert
Uytterhoeven, Hari Bathini, Julia Lawall, Kajol Jain, Keith Packard,
Lukas Bulwahn, Madhavan Srinivasan, Markus Elfring, Michal Suchanek,
Ming Lei, Mukesh Kumar Chaurasiya, Nathan Chancellor, Naveen N Rao,
Nicholas Piggin, Nysal Jan K.A, Paulo Miguel Almeida, Pavithra Prakash,
Ritesh Harjani (IBM), Rob Herring (Arm), Sachin P Bappalige, Shen
Lichuan, Simon Horman, Sourabh Jain, Thomas Weißschuh, Thorsten Blum,
Thorsten Leemhuis, Venkat Rao Bagalkote, Zhang Zekun, and zhang jiao.
* tag 'powerpc-6.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (89 commits)
EDAC/powerpc: Remove PPC_MAPLE drivers
powerpc/perf: Add per-task/process monitoring to vpa_pmu driver
powerpc/kvm: Add vpa latency counters to kvm_vcpu_arch
docs: ABI: sysfs-bus-event_source-devices-vpa-pmu: Document sysfs event format entries for vpa_pmu
powerpc/perf: Add perf interface to expose vpa counters
MAINTAINERS: powerpc: Mark Maddy as "M"
powerpc/Makefile: Allow overriding CPP
powerpc-km82xx.c: replace of_node_put() with __free
ps3: Correct some typos in comments
powerpc/kexec: Fix return of uninitialized variable
macintosh: Use common error handling code in via_pmu_led_init()
powerpc/powermac: Use of_property_match_string() in pmac_has_backlight_type()
powerpc: remove dead config options for MPC85xx platform support
powerpc/xive: Use cpumask_intersects()
selftests/powerpc: Remove the path after initialization.
powerpc/xmon: symbol lookup length fixed
powerpc/ep8248e: Use %pa to format resource_size_t
powerpc/ps3: Reorganize kerneldoc parameter names
KVM: PPC: Book3S HV: Fix kmv -> kvm typo
powerpc/sstep: make emulate_vsx_load and emulate_vsx_store static
...
Sergey Senozhatsky improves zram's post-processing selection algorithm.
This leads to improved memory savings.
- Wei Yang has gone to town on the mapletree code, contributing several
series which clean up the implementation:
- "refine mas_mab_cp()"
- "Reduce the space to be cleared for maple_big_node"
- "maple_tree: simplify mas_push_node()"
- "Following cleanup after introduce mas_wr_store_type()"
- "refine storing null"
- The series "selftests/mm: hugetlb_fault_after_madv improvements" from
David Hildenbrand fixes this selftest for s390.
- The series "introduce pte_offset_map_{ro|rw}_nolock()" from Qi Zheng
implements some rationaizations and cleanups in the page mapping code.
- The series "mm: optimize shadow entries removal" from Shakeel Butt
optimizes the file truncation code by speeding up the handling of shadow
entries.
- The series "Remove PageKsm()" from Matthew Wilcox completes the
migration of this flag over to being a folio-based flag.
- The series "Unify hugetlb into arch_get_unmapped_area functions" from
Oscar Salvador implements a bunch of consolidations and cleanups in the
hugetlb code.
- The series "Do not shatter hugezeropage on wp-fault" from Dev Jain
takes away the wp-fault time practice of turning a huge zero page into
small pages. Instead we replace the whole thing with a THP. More
consistent cleaner and potentiall saves a large number of pagefaults.
- The series "percpu: Add a test case and fix for clang" from Andy
Shevchenko enhances and fixes the kernel's built in percpu test code.
- The series "mm/mremap: Remove extra vma tree walk" from Liam Howlett
optimizes mremap() by avoiding doing things which we didn't need to do.
- The series "Improve the tmpfs large folio read performance" from
Baolin Wang teaches tmpfs to copy data into userspace at the folio size
rather than as individual pages. A 20% speedup was observed.
- The series "mm/damon/vaddr: Fix issue in
damon_va_evenly_split_region()" fro Zheng Yejian fixes DAMON splitting.
- The series "memcg-v1: fully deprecate charge moving" from Shakeel Butt
removes the long-deprecated memcgv2 charge moving feature.
- The series "fix error handling in mmap_region() and refactor" from
Lorenzo Stoakes cleanup up some of the mmap() error handling and
addresses some potential performance issues.
- The series "x86/module: use large ROX pages for text allocations" from
Mike Rapoport teaches x86 to use large pages for read-only-execute
module text.
- The series "page allocation tag compression" from Suren Baghdasaryan
is followon maintenance work for the new page allocation profiling
feature.
- The series "page->index removals in mm" from Matthew Wilcox remove
most references to page->index in mm/. A slow march towards shrinking
struct page.
- The series "damon/{self,kunit}tests: minor fixups for DAMON debugfs
interface tests" from Andrew Paniakin performs maintenance work for
DAMON's self testing code.
- The series "mm: zswap swap-out of large folios" from Kanchana Sridhar
improves zswap's batching of compression and decompression. It is a
step along the way towards using Intel IAA hardware acceleration for
this zswap operation.
- The series "kasan: migrate the last module test to kunit" from
Sabyrzhan Tasbolatov completes the migration of the KASAN built-in tests
over to the KUnit framework.
- The series "implement lightweight guard pages" from Lorenzo Stoakes
permits userapace to place fault-generating guard pages within a single
VMA, rather than requiring that multiple VMAs be created for this.
Improved efficiencies for userspace memory allocators are expected.
- The series "memcg: tracepoint for flushing stats" from JP Kobryn uses
tracepoints to provide increased visibility into memcg stats flushing
activity.
- The series "zram: IDLE flag handling fixes" from Sergey Senozhatsky
fixes a zram buglet which potentially affected performance.
- The series "mm: add more kernel parameters to control mTHP" from
Maíra Canal enhances our ability to control/configuremultisize THP from
the kernel boot command line.
- The series "kasan: few improvements on kunit tests" from Sabyrzhan
Tasbolatov has a couple of fixups for the KASAN KUnit tests.
- The series "mm/list_lru: Split list_lru lock into per-cgroup scope"
from Kairui Song optimizes list_lru memory utilization when lockdep is
enabled.
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Merge tag 'mm-stable-2024-11-18-19-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- The series "zram: optimal post-processing target selection" from
Sergey Senozhatsky improves zram's post-processing selection
algorithm. This leads to improved memory savings.
- Wei Yang has gone to town on the mapletree code, contributing several
series which clean up the implementation:
- "refine mas_mab_cp()"
- "Reduce the space to be cleared for maple_big_node"
- "maple_tree: simplify mas_push_node()"
- "Following cleanup after introduce mas_wr_store_type()"
- "refine storing null"
- The series "selftests/mm: hugetlb_fault_after_madv improvements" from
David Hildenbrand fixes this selftest for s390.
- The series "introduce pte_offset_map_{ro|rw}_nolock()" from Qi Zheng
implements some rationaizations and cleanups in the page mapping
code.
- The series "mm: optimize shadow entries removal" from Shakeel Butt
optimizes the file truncation code by speeding up the handling of
shadow entries.
- The series "Remove PageKsm()" from Matthew Wilcox completes the
migration of this flag over to being a folio-based flag.
- The series "Unify hugetlb into arch_get_unmapped_area functions" from
Oscar Salvador implements a bunch of consolidations and cleanups in
the hugetlb code.
- The series "Do not shatter hugezeropage on wp-fault" from Dev Jain
takes away the wp-fault time practice of turning a huge zero page
into small pages. Instead we replace the whole thing with a THP. More
consistent cleaner and potentiall saves a large number of pagefaults.
- The series "percpu: Add a test case and fix for clang" from Andy
Shevchenko enhances and fixes the kernel's built in percpu test code.
- The series "mm/mremap: Remove extra vma tree walk" from Liam Howlett
optimizes mremap() by avoiding doing things which we didn't need to
do.
- The series "Improve the tmpfs large folio read performance" from
Baolin Wang teaches tmpfs to copy data into userspace at the folio
size rather than as individual pages. A 20% speedup was observed.
- The series "mm/damon/vaddr: Fix issue in
damon_va_evenly_split_region()" fro Zheng Yejian fixes DAMON
splitting.
- The series "memcg-v1: fully deprecate charge moving" from Shakeel
Butt removes the long-deprecated memcgv2 charge moving feature.
- The series "fix error handling in mmap_region() and refactor" from
Lorenzo Stoakes cleanup up some of the mmap() error handling and
addresses some potential performance issues.
- The series "x86/module: use large ROX pages for text allocations"
from Mike Rapoport teaches x86 to use large pages for
read-only-execute module text.
- The series "page allocation tag compression" from Suren Baghdasaryan
is followon maintenance work for the new page allocation profiling
feature.
- The series "page->index removals in mm" from Matthew Wilcox remove
most references to page->index in mm/. A slow march towards shrinking
struct page.
- The series "damon/{self,kunit}tests: minor fixups for DAMON debugfs
interface tests" from Andrew Paniakin performs maintenance work for
DAMON's self testing code.
- The series "mm: zswap swap-out of large folios" from Kanchana Sridhar
improves zswap's batching of compression and decompression. It is a
step along the way towards using Intel IAA hardware acceleration for
this zswap operation.
- The series "kasan: migrate the last module test to kunit" from
Sabyrzhan Tasbolatov completes the migration of the KASAN built-in
tests over to the KUnit framework.
- The series "implement lightweight guard pages" from Lorenzo Stoakes
permits userapace to place fault-generating guard pages within a
single VMA, rather than requiring that multiple VMAs be created for
this. Improved efficiencies for userspace memory allocators are
expected.
- The series "memcg: tracepoint for flushing stats" from JP Kobryn uses
tracepoints to provide increased visibility into memcg stats flushing
activity.
- The series "zram: IDLE flag handling fixes" from Sergey Senozhatsky
fixes a zram buglet which potentially affected performance.
- The series "mm: add more kernel parameters to control mTHP" from
Maíra Canal enhances our ability to control/configuremultisize THP
from the kernel boot command line.
- The series "kasan: few improvements on kunit tests" from Sabyrzhan
Tasbolatov has a couple of fixups for the KASAN KUnit tests.
- The series "mm/list_lru: Split list_lru lock into per-cgroup scope"
from Kairui Song optimizes list_lru memory utilization when lockdep
is enabled.
* tag 'mm-stable-2024-11-18-19-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (215 commits)
cma: enforce non-zero pageblock_order during cma_init_reserved_mem()
mm/kfence: add a new kunit test test_use_after_free_read_nofault()
zram: fix NULL pointer in comp_algorithm_show()
memcg/hugetlb: add hugeTLB counters to memcg
vmstat: call fold_vm_zone_numa_events() before show per zone NUMA event
mm: mmap_lock: check trace_mmap_lock_$type_enabled() instead of regcount
zram: ZRAM_DEF_COMP should depend on ZRAM
MAINTAINERS/MEMORY MANAGEMENT: add document files for mm
Docs/mm/damon: recommend academic papers to read and/or cite
mm: define general function pXd_init()
kmemleak: iommu/iova: fix transient kmemleak false positive
mm/list_lru: simplify the list_lru walk callback function
mm/list_lru: split the lock to per-cgroup scope
mm/list_lru: simplify reparenting and initial allocation
mm/list_lru: code clean up for reparenting
mm/list_lru: don't export list_lru_add
mm/list_lru: don't pass unnecessary key parameters
kasan: add kunit tests for kmalloc_track_caller, kmalloc_node_track_caller
kasan: change kasan_atomics kunit test as KUNIT_CASE_SLOW
kasan: use EXPORT_SYMBOL_IF_KUNIT to export symbols
...
- Add SAR2130P compatible to DT bindings in the QCom Tsens driver (Dmitry
Baryshkov).
- Add static annotation to arrays describing platform sensors in the
LVTS Mediatek driver (Colin Ian King).
- Switch back to struct platform_driver::remove() from the previous
callbacks prototype rework (Uwe Kleine-König).
- Add MSM8937 compatible to DT bindings and its support in the QCom
Tsens driver (Barnabás Czémán).
- Remove a pointless sign test on an unsigned value in k3_bgp_read_temp()
in the k3_j72xx_bandgap driver (Rex Nie).
- Fix a pointer reference loss when realloc() fails in the thermal
library (Zhang Jiao).
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Merge tag 'thermal-6.13-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more thermal control updates from Rafael Wysocki:
"These update a few thermal drivers used on ARM platforms and thermal
tools:
- Add SAR2130P compatible to DT bindings in the QCom Tsens driver
(Dmitry Baryshkov)
- Add static annotation to arrays describing platform sensors in the
LVTS Mediatek driver (Colin Ian King)
- Switch back to struct platform_driver::remove() from the previous
callbacks prototype rework (Uwe Kleine-König)
- Add MSM8937 compatible to DT bindings and its support in the QCom
Tsens driver (Barnabás Czémán)
- Remove a pointless sign test on an unsigned value in
k3_bgp_read_temp() in the k3_j72xx_bandgap driver (Rex Nie)
- Fix a pointer reference loss when realloc() fails in the thermal
library (Zhang Jiao)"
* tag 'thermal-6.13-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
tools/thermal: Fix common realloc mistake
thermal/drivers/k3_j72xx_bandgap: Simplify code in k3_bgp_read_temp()
thermal/drivers/qcom/tsens-v1: Add support for MSM8937 tsens
dt-bindings: thermal: tsens: Add MSM8937
thermal: Switch back to struct platform_driver::remove()
thermal/drivers/mediatek/lvts_thermal: Make read-only arrays static const
dt-bindings: thermal: qcom-tsens: Add SAR2130P compatible
Linus Torvalds